CN202307480U - Independent multilayer printed circuit board (PCB) planar transformer - Google Patents

Independent multilayer printed circuit board (PCB) planar transformer Download PDF

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Publication number
CN202307480U
CN202307480U CN2011204476930U CN201120447693U CN202307480U CN 202307480 U CN202307480 U CN 202307480U CN 2011204476930 U CN2011204476930 U CN 2011204476930U CN 201120447693 U CN201120447693 U CN 201120447693U CN 202307480 U CN202307480 U CN 202307480U
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CN
China
Prior art keywords
pcb
transformer
hole
winding
self
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011204476930U
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Chinese (zh)
Inventor
曾建欣
王希
彭一弘
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NTS Technology Chengdu Co Ltd
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NTS Technology Chengdu Co Ltd
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Publication date
Application filed by NTS Technology Chengdu Co Ltd filed Critical NTS Technology Chengdu Co Ltd
Priority to CN2011204476930U priority Critical patent/CN202307480U/en
Application granted granted Critical
Publication of CN202307480U publication Critical patent/CN202307480U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a planar transformer, in particular to an independent multilayer printed circuit board (PCB) planar transformer, which comprises a magnetic core, a primary winding and a secondary winding, wherein the primary winding and the secondary winding are on the same thick copper plate PCB provided with pins. The independent multilayer PCB planar transformer is low in height, small in volume, light in weight and good in radiating performance, and power density of the transformer and performance of the transformer are high in uniformity.

Description

A kind of self multi-layer PCB flat surface transformer
Technical field
The utility model relates to a kind of transformer, particularly a kind of self multi-layer PCB flat surface transformer.
Background technology
Along with the development of electronic information technology, electronic device will further develop to small-sized light, mounted on surface, chip, complanation, high reliability direction." short, little, light, thin " is one of important trend of current Switching Power Supply development, and its topmost realization means are exactly to improve power density and adopt low moulding and the little components and parts of volume and weight.Conventional transformer exposes many restrictions in Switching Power Supply.Because the major parameter that transformer relates to has voltage, electric current, frequency, the turn ratio; Temperature, magnetic core u value, leakage inductance, loss; Profile, sizes etc. are so can't there be ready-made transformer can supply to select for use as other electron component always; Usually will pass through loaded down with trivial details calculating and select magnetic core and winding conducting wire, and production method there is very big influence to transformer performance, the difficult measurement of many parameters of transformer in addition; Bring certain blindness to the user, be difficult in frequency response, aspects such as leakage inductance volume and heat radiation reach satisfied effect.Traditional transformer is made up of FERRITE CORE and copper coil usually, and volume is big, and radiating effect is undesirable, and the power density of transformer and the consistency of transformer performance are poor.
The utility model content
The technical problem that the utility model will solve is to overcome that the traditional transformer volume is big, the problem of the consistency difference of power density and transformer performance; A kind of self multi-layer PCB flat surface transformer is provided; This PCB flat surface transformer height reduces little, in light weight, the good heat dissipation of volume, and the power density of transformer and the consistency of transformer performance are high.
For solving the problems of the technologies described above, the utility model provides following technical scheme:
A kind of self multi-layer PCB flat surface transformer comprises magnetic core, elementary winding and secondary winding, and said elementary winding and secondary winding are arranged on the same thick copper coin PCB, and said thick copper coin PCB is provided with pin.
In the above-mentioned self multi-layer PCB flat surface transformer, said thick copper coin PCB is made up of 16 layers of pcb board, and said elementary winding and secondary winding are positioned on the pcb board of thick copper coin PCB different layers, and top layer and bottom do not connect up.
In the above-mentioned self multi-layer PCB flat surface transformer, said thick copper coin pcb board is provided with via hole.
Further, said via hole is through hole, has avoided using the hidden danger that buried via hole brought; Said pin is arranged in the said through hole, realizes the serial or parallel connection and the auxiliary heat dissipation of transformer independence installing and locating, electric function input and output, layer and interlayer winding through pin.
In the above-mentioned self multi-layer PCB flat surface transformer, also be provided with plain conductor in the said through hole, to increase the through-current capacity of whole transformer.
In the above-mentioned self multi-layer PCB flat surface transformer, said magnetic core is the RM planar magnetic core, to reach the purpose of miniaturization, high power density.
Compared with prior art, the beneficial effect of the utility model:
The self multi-layer PCB flat surface transformer of the utility model comprises RM planar magnetic core, elementary winding and secondary winding; Said elementary winding and secondary winding are arranged on the same thick copper coin PCB; Said thick copper coin PCB is provided with pin, and the primary and secondary winding is produced on the same thick copper coin PCB, the High Accuracy Control of pcb board processing; Can make the transformer of making have extraordinary electrical characteristic consistency; Significantly reduce the height of transformer, reduce volume and weight, improve the power density of transformer and the performance of Switching Power Supply.Said thick copper coin PCB is provided with via hole, and said via hole is through hole, has avoided using the hidden danger that buried via hole brought; Said pin is arranged in the said through hole, realizes the serial or parallel connection and the auxiliary heat dissipation of transformer independence installing and locating, electric function input and output, layer and interlayer winding through pin; Also be provided with plain conductor in the said in addition through hole, to increase the through-current capacity of whole transformer.
Description of drawings
Fig. 1 is the schematic diagram of the utility model self multi-layer PCB flat surface transformer;
Fig. 2 is the utility model self multi-layer PCB flat surface transformer external structure sketch map;
Fig. 3 is the winding mode figure of the utility model self multi-layer PCB flat surface transformer;
Fig. 4 is the installing hole and the via hole sketch map of the utility model self multi-layer PCB flat surface transformer;
Fig. 5-L2 to Fig. 5-L15 is inner each layer cabling of the thick copper coin PCB sketch map of the utility model self multi-layer PCB flat surface transformer.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
The execution mode of the utility model is not limited to following examples, all belongs within the protection range of the utility model in the various variations of making under the prerequisite that does not break away from the utility model aim.
Embodiment
The self multi-layer PCB flat surface transformer of the utility model; Comprise magnetic core, elementary winding and secondary winding; Said elementary winding and secondary winding are arranged on the same thick copper coin PCB, utilize the Copper Foil on the thick copper coin PCB to carry out the winding cabling, also are provided with pin on the said thick copper coin PCB.The primary and secondary winding is produced on the same thick copper coin PCB; The High Accuracy Control of pcb board processing; Can make the transformer of making have extraordinary electrical characteristic consistency, significantly reduce the height of transformer, reduce volume and weight; Improve the performances such as power density of transformer, specifically describe below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram of this self multi-layer PCB flat surface transformer.The transformer turn ratio is 1:1, elementary 4 circles, secondary 4 circles, secondary 1 tap.Fig. 2 is this PCB flat surface transformer external structure sketch map, and A and C are input, and D, F, H are output, and F is said secondary tap.
Shown in Fig. 3, Fig. 5-L2 to 5-L15, in the present embodiment, said thick copper coin PCB is made up of 16 layers of pcb board, and said elementary winding and secondary winding are positioned on the pcb board of thick copper coin PCB different layers, and top layer and bottom do not connect up.Said elementary winding and secondary winding Copper Foil line are positioned on L2 to the L15 layer of thick copper coin PCB; Realize the variation of the said elementary winding and the secondary winding number of turn through the serial or parallel connection between layer and the layer; Also be provided with via hole (A, B, C, D, E, F, G, H) on the said pcb board, all via holes are through hole.Inner each layer cabling of said thick copper coin PCB and annexation are specially: 5-L2,5-L8,5-L14 2 circles that wind the line; Be together in parallel through via hole A and via hole B; L3, L9, L15 2 circles that wind the line; Be together in parallel through via hole B and via hole C, cross via hole B simultaneously all the windings in series that L2, L8, L14 and L3, L9, L15 form is constituted 4 circle primary coils; L4, L10 2 circles that wind the line are together in parallel through via hole D and E, and L5, L11 2 circles that wind the line are together in parallel through via hole E and via hole F, through via hole E the windings in series of the composition of L4, L10 and L5, L11 are constituted one group of 4 circle secondary coil simultaneously; L7, L13 2 circles that wind the line are together in parallel through via hole G and H, and L6, L12 2 circles that wind the line are together in parallel through via hole F and via hole G, through via hole G the composition windings in series of L7, L13 and L6, L12 are constituted one group of 4 circle secondary coil simultaneously; Via hole F is as secondary tap, and via hole F is with L5, L6 series connection, with L11, L12 series connection simultaneously.It all is that through hole connects that this cabling mode makes institute porose, has avoided using the hidden danger that buried via hole brought, because when circuit breaks down, buried via hole is unfavorable for checking pinpoints the problems.
As preferred version, in the present embodiment, the size of said via hole can be selected more greatly, when through-current capacity is not enough, can increase through-current capacity through the mode that in via hole, increases plain conductor.
As shown in Figure 4, via hole A, C, D, F, H are as the input and output terminal installing hole in the present embodiment, and wherein via hole A and C are input terminal; Via hole D, via hole F and via hole H are lead-out terminal, and via hole F is secondary tap, and input pin is installed in via hole A and via hole C; Output pin is installed in via hole D, via hole F and via hole H; Through the relation of being connected in parallel of Copper Foil winding cabling between via hole A, C, D, F, H complete layer and the layer, increase the electric current ability to bear of primary and secondary winding, also accomplish installation function simultaneously; Owing to adopt thicker pin, therefore also can accomplish the conduction of PCB transformer portion heat; The coupling of height when realizing installing through the length that customizes this pin in addition with another piece PCB.
In the present embodiment; Said magnetic core is the RM planar magnetic core; The shape of thick copper coin PCB also can make flexibly according to the shape size of planar magnetic core; Flat surface transformer that thick copper coin PCB and planar magnetic core constitute has reached the purpose of miniaturization, high power density, is applicable to the DC/DC low pressure high frequency switch power that volume is little, power density is high.
Combine accompanying drawing that the embodiment of the utility model is described in detail above; But the utility model is not limited to the foregoing description; In the ken that those of ordinary skills possessed, can also make various variations, these variations all belong within the protection range of the utility model.

Claims (7)

1. a self multi-layer PCB flat surface transformer comprises magnetic core, elementary winding and secondary winding, it is characterized in that: said elementary winding and secondary winding are arranged on the same thick copper coin PCB, and said thick copper coin PCB is provided with pin.
2. a kind of self multi-layer PCB flat surface transformer according to claim 1 is characterized in that: said thick copper coin PCB is made up of 16 layers of pcb board, and said elementary winding and secondary winding are positioned on the pcb board of said thick copper coin PCB different layers.
3. a kind of self multi-layer PCB flat surface transformer according to claim 1 and 2 is characterized in that: said thick copper coin pcb board is provided with via hole.
4. a kind of self multi-layer PCB flat surface transformer according to claim 3, it is characterized in that: said via hole is through hole.
5. a kind of self multi-layer PCB flat surface transformer according to claim 4, it is characterized in that: said pin is arranged in the said through hole.
6. a kind of self multi-layer PCB flat surface transformer according to claim 5 is characterized in that: be provided with plain conductor in the said through hole.
7. a kind of self multi-layer PCB flat surface transformer according to claim 1, it is characterized in that: said magnetic core is the RM planar magnetic core.
CN2011204476930U 2011-11-14 2011-11-14 Independent multilayer printed circuit board (PCB) planar transformer Expired - Fee Related CN202307480U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011204476930U CN202307480U (en) 2011-11-14 2011-11-14 Independent multilayer printed circuit board (PCB) planar transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011204476930U CN202307480U (en) 2011-11-14 2011-11-14 Independent multilayer printed circuit board (PCB) planar transformer

Publications (1)

Publication Number Publication Date
CN202307480U true CN202307480U (en) 2012-07-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011204476930U Expired - Fee Related CN202307480U (en) 2011-11-14 2011-11-14 Independent multilayer printed circuit board (PCB) planar transformer

Country Status (1)

Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102832026A (en) * 2012-09-19 2012-12-19 山东电力集团公司济南供电公司 High-frequency high-pressure high-power density transformer
CN103928219A (en) * 2014-03-21 2014-07-16 长兴柏成电子有限公司 Multi-winding planar transformer manufactured on PCBs (printed circuit boards)
CN105304296A (en) * 2015-11-04 2016-02-03 中国船舶重工集团公司第七二三研究所 Planar transformer of printed circuit board
CN105761881A (en) * 2016-05-20 2016-07-13 浙江求缺科技有限公司 Planar winding coil for double-column magnetic core structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102832026A (en) * 2012-09-19 2012-12-19 山东电力集团公司济南供电公司 High-frequency high-pressure high-power density transformer
CN103928219A (en) * 2014-03-21 2014-07-16 长兴柏成电子有限公司 Multi-winding planar transformer manufactured on PCBs (printed circuit boards)
CN103928219B (en) * 2014-03-21 2016-08-24 长兴柏成电子有限公司 A kind of Multiple coil flat surface transformer being produced on PCB
CN105304296A (en) * 2015-11-04 2016-02-03 中国船舶重工集团公司第七二三研究所 Planar transformer of printed circuit board
CN105761881A (en) * 2016-05-20 2016-07-13 浙江求缺科技有限公司 Planar winding coil for double-column magnetic core structure

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120704

Termination date: 20131114